file system check software

[Edward Ned Harvey]

> As I move through this corrupted file system problem, I'm going to have
> to wipe out my 7 terabyte file system and rebuild it. But not that I
> live in a world of data paranoia, I'd like to run some kind of file
> system checking software. Does something like that exist? Basically I
> need to write large (multi gigabyte files) filled with random numbers
> and copy them around and do diffs and md5sum checks. This should go on
> for about a week of continuous write, read and checking.

Could you be more specific?

Filesystem checking is automatic in ext3 and newer (or any journaling
filesystem.)  And there's fsck for anything older.  But I don't think that's
what you're talking about is it?

Maybe you're talking about ... you want to identify when some data error is
taking place on disk?

Are you required to stay with Linux?  If you could use ZFS, it does all that
in the background, checksumming every time there's a filesystem read or
write.

Or maybe you're looking for a way to surface-scan the disks that you
presently have, to find a failed disk?

I'm not clear on exactly what you're asking.